WO2021088918A1

WO2021088918A1 - Method executed by user equipment and user equipment

Info

Publication number: WO2021088918A1
Application number: PCT/CN2020/126714
Authority: WO
Inventors: 赵毅男; 刘仁茂; 罗超
Original assignee: 夏普株式会社; 赵毅男
Priority date: 2019-11-06
Filing date: 2020-11-05
Publication date: 2021-05-14
Also published as: CN112770402A

Abstract

Provided are a method executed by a user equipment (UE) and a UE. The method comprises: receiving first sidelink communication configuration information sent by a base station gNB; receiving second sidelink communication configuration information sent by the base station gNB; receiving configuration information of a sidelink communication configured grant sent by the base station gNB; and a UE determining resources of the configured grant indicated by the configuration information of the configured grant.

Description

Method executed by user equipment and user equipment

Technical field

The present invention relates to the field of wireless communication technology, and in particular to methods executed by user equipment and corresponding user equipment.

Background technique

In traditional cellular networks, all communications must pass through base stations. The difference is that D2D communication (Device-to-Device communication, device-to-device direct communication) refers to a direct communication method between two user devices without being forwarded by a base station or core network. At the RAN#63 plenary meeting of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) in March 2014, the research topic on the use of LTE equipment to achieve near D2D communication services was approved (see Non-Patent Document 1). LTE Release 12 The functions introduced by D2D include:

1) Discovery between neighboring devices in the LTE network coverage scenario (Discovery);

2) Direct broadcast communication (Broadcast) function between adjacent devices;

3) The upper layer supports Unicast and Groupcast communication functions.

At the 3GPP RAN#66 plenary meeting in December 2014, the enhanced LTE eD2D (enhanced D2D) research project was approved (see Non-Patent Document 2). LTE Release 13 The main functions introduced by eD2D include:

1) D2D discovery of scenarios without network coverage and partial network coverage;

2) The priority processing mechanism of D2D communication.

Based on the design of the D2D communication mechanism, at the RAN#68 plenary meeting of 3GPP in June 2015, the V2X feasibility study topic based on D2D communication was approved. V2X stands for Vehicle to Everything, and hopes to realize the information interaction between vehicles and all entities that may affect vehicles. The purpose is to reduce accidents, alleviate traffic congestion, reduce environmental pollution, and provide other information services. The application scenarios of V2X mainly include 4 aspects:

1) V2V, Vehicle to Vehicle, that is, vehicle-to-vehicle communication;

2) V2P, Vehicle to Pedestrian, that is, the vehicle sends a warning to pedestrians or non-motorized vehicles;

3) V2N, Vehicle to Network, that is, the vehicle connects to the mobile network;

4) V2I, Vehicle to Infrastructure, that is, communication between vehicles and road infrastructure.

3GPP divides the research and standardization of V2X into three stages. The first phase was completed in September 2016, mainly focused on V2V, based on LTE Release 12 and Release 13 D2D (also called sidelink communication), that is, the development of proximity communication technology (see Non-Patent Document 3). V2X stage 1 introduced a new D2D communication interface called the PC5 interface. The PC5 interface is mainly used to solve the problem of cellular car networking communication under high-speed (up to 250 km/h) and high node density environments. Vehicles can interact with information such as position, speed and direction through the PC5 interface, that is, vehicles can communicate directly through the PC5 interface. Compared with the proximity communication between D2D devices, the functions introduced by LTE Release 14 V2X mainly include:

1) Higher density DMRS to support high-speed scenes;

2) Introduce sub-channels to enhance resource allocation methods;

3) Introduce a user equipment sensing mechanism with semi-persistent.

The second phase of the V2X research topic belongs to the LTE Release 15 research category (see Non-Patent Document 4). The main features introduced include high-order 64QAM modulation, V2X carrier aggregation, and short TTI transmission, as well as the feasibility study of transmit diversity.

At the 3GPP RAN#80 plenary meeting in June 2018, the corresponding Phase 3 V2X feasibility study project based on 5G NR network technology (see Non-Patent Document 5) was approved.

At the 3GPP RAN1 AH#1901 meeting in January 2019 (see Non-Patent Document 6), regarding transmission mode 1 in NR sidelink, the following meeting conclusions were reached:

When the NR base station gNB schedules NR side-line communication transmission mode 1, it supports Type 1 configured scheduling grant (Type 1 configured grant) and Type 2 configured scheduling grant (Type 2 configured grant).

At the 3GPP RAN1#96bis meeting in April 2019 (see Non-Patent Document 7), regarding the configuration of scheduling permission in NR sideline communication, the following meeting conclusions were reached:

The type 1 or type 2 configuration scheduling permission in the sideline communication indicates a set of periodic resources (periodic resources) used for one or more NR sidelink transmissions (multiple sidelink transmissions).

The solution of the present invention includes a method for user equipment to determine type 1 configuration scheduling permitted resources in NR side-line communication.

Prior art literature

Non-patent literature

Non-Patent Document 1: RP-140518, Work item proposal on LTE Device to Device Proximity Services

Non-Patent Document 2: RP-142311, Work Item Proposal for Enhanced LTE Device to Device Proximity Services

Non-Patent Document 3: RP-152293, New WI proposal: Support for V2V services based on LTE sidelink

Non-Patent Document 4: RP-170798, New WID on 3GPP V2X Phase 2

Non-Patent Document 5: RP-181480, New SID Proposal: Study on NR V2X

Non-Patent Document 6: RAN1 AH#1901, Chairman notes, section 7.2.4.1.4

Non-Patent Document 7: RAN1#96bis, Chairman notes, section 7.2.4.2.1

Summary of the invention

In order to solve at least a part of the above-mentioned problems, the present invention provides a method executed by a user equipment and a user equipment.

The method executed by the user equipment according to the first aspect of the present invention includes: receiving first sideline communication configuration information sent by a base station gNB; receiving second sideline communication configuration information sent by the base station gNB; and receiving the base station gNB The sent configuration information of the configured grant of the side-line communication configuration scheduling permit, and the user equipment is the side-line communication user equipment.

According to the method of the first aspect of the present invention, the first side-line communication configuration information includes configuration information of the side-line communication resource pool; and/or the configuration information of the side-line communication resource pool includes the first configuration of the resource pool cycle. The user equipment determines the number of resources belonging to the resource pool in the first configuration period according to the configuration information of the side-line communication resource pool.

According to the method of the first aspect of the present invention, the second side-line communication configuration information includes a second configuration period of resources available for side-line communication transmission. The user equipment determines the number of time slots of the resources available for the sideline communication transmission in the second configuration period.

According to the method of the first aspect of the present invention, the configuration information of the side-line communication configuration scheduling permission includes the period of configuring the scheduling permission; and/or the configuration information of the side-line communication configuration scheduling permission includes the configuration information of the scheduling permission Time domain resource offset timeDomainOffset.

The method according to the first aspect of the present invention further includes: the user equipment according to the timeDomainOffset, and/or configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and /Or the Periodicity determines the resource of the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission.

The method according to the first aspect of the present invention further includes: the user equipment determines according to the configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and/or the Periodicity Resources for side-line communication transmission.

According to the method of the first aspect of the present invention, the resource for sideline communication transmission is the transmission resource corresponding to the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission; and/or the resource for sideline communication transmission is used for Transmission of the physical side-line communication control channel PSCCH and the physical side-line communication shared channel PSSCH, or PSSCH.

The communication device according to the second aspect of the present invention is a communication device with a packet data convergence protocol PDCP entity, including: a processor; and a memory storing instructions; wherein the instructions are executed when the processor is running. The method of the first aspect.

Description of the drawings

The above and other features of the present invention will become more apparent through the following detailed description in conjunction with the accompanying drawings, among which:

Figure 1 is a schematic diagram showing LTE V2X UE side-line communication.

Fig. 2 is a schematic diagram showing the resource allocation mode of LTE V2X.

Fig. 3 is a schematic diagram showing the basic process of the method executed by the user equipment in the first embodiment and the second embodiment of the invention.

Fig. 4 is a schematic diagram showing the basic process of the method executed by the user equipment in the third and fourth embodiments of the invention.

Fig. 5 is a block diagram showing a user equipment according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the drawings and specific implementations. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies that are not directly related to the present invention are omitted to prevent confusion in the understanding of the present invention.

Hereinafter, taking the 5G mobile communication system and its subsequent evolved versions as an example application environment, multiple embodiments according to the present invention are described in detail. However, it should be pointed out that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

The following describes some terms related to the present invention. Unless otherwise specified, the terms related to the present invention are defined here. The terminology given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later communication systems, but a unified terminology is used in the present invention. When applied to a specific system, It can be replaced with terms used in the corresponding system.

3GPP: 3rd Generation Partnership Project, the third generation partnership project

LTE: Long Term Evolution, long-term evolution technology

NR: New Radio, New Radio, New Radio

PDCCH: Physical Downlink Control Channel, physical downlink control channel

DCI: Downlink Control Information, downlink control information

PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

UE: User Equipment, user equipment

eNB: evolved NodeB, evolved base station

gNB: NR base station

TTI: Transmission Time Interval, transmission time interval

OFDM: Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing with Cyclic Prefix

C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

CSI: Channel State Information, channel state information

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

CSI-RS: Channel State Information Reference Signal, channel state information reference signal

CRS: Cell Reference Signal, cell specific reference signal

PUCCH: Physical Uplink Control Channel, physical uplink control channel

PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

UL-SCH: Uplink Shared Channel, uplink shared channel

CG: Configured Grant, configure scheduling permission

Sidelink: side-line communication

SCI: Sidelink Control Information, side-line communication control information

PSCCH: Physical Sidelink Control Channel, physical side link control channel

MCS: Modulation and Coding Scheme, modulation and coding scheme

RB: Resource Block, resource block

RE: Resource Element, resource unit

CRB: Common Resource Block, common resource block

CP: Cyclic Prefix, cyclic prefix

PRB: Physical Resource Block, physical resource block

PSSCH: Physical Sidelink Shared Channel, physical sidelink shared channel

FDM: Frequency Division Multiplexing, Frequency Division Multiplexing

RRC: Radio Resource Control, radio resource control

RSRP: Reference Signal Receiving Power, reference signal received power

SRS: Sounding Reference Signal, sounding reference signal

DMRS: Demodulation Reference Signal, demodulation reference signal

CRC: Cyclic Redundancy Check, cyclic redundancy check

PSDCH: Physical Sidelink Discovery Channel, physical side link discovery channel

PSBCH: Physical Sidelink Broadcast Channel, physical side-line communication broadcast channel

SFI: Slot Format Indication, slot format indication

TDD: Time Division Duplexing, Time Division Duplexing

FDD: Frequency Division Duplexing, Frequency Division Duplexing

SIB1: System Information Block Type 1, System Information Block Type 1

SLSS: Sidelink synchronization Signal, side-line communication synchronization signal

PSSS: Primary Sidelink Synchronization Signal, the main synchronization signal of side-line communication

SSSS: Secondary Sidelink Synchronization Signal, secondary synchronization signal for side-line communication

PCI: Physical Cell ID, physical cell ID

PSS: Primary Synchronization Signal, the primary synchronization signal

SSS: Secondary Synchronization Signal, secondary synchronization signal

BWP: BandWidth Part, bandwidth segment/part

GNSS: Global Navigation Satellite System, Global Navigation Satellite Positioning System

SFN: System Frame Number, system (wireless) frame number

DFN: Direct Frame Number, direct frame number

IE: Information Element, information element

SSB: Synchronization Signal Block, synchronization system information block

EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connection

MCG: Master Cell Group, master cell group

SCG: Secondary Cell Group, secondary cell group

PCell: Primary Cell, primary cell

SCell: Secondary Cell, secondary cell

PSFCH: Physical Sidelink Feedback Channel, the physical sidelink feedback channel

SPS: Semi-Persistant Scheduling, semi-static scheduling

TA: Timing Advance, uplink timing advance

MAC: Medium Access Control, media access control layer (protocol)

The following is a description of the prior art associated with the solution of the present invention. Unless otherwise specified, the same terms in the specific embodiments have the same meanings as in the prior art.

It is worth pointing out that V2X and sidelink involved in the specification of the present invention have the same meaning. V2X in the text can also mean sidelink; similarly, sidelink in the text can also mean V2X, and no specific distinction and limitation will be made in the following text.

The resource allocation mode of V2X (sidelink) communication and the transmission mode of V2X (sidelink) communication in the specification of the present invention can be replaced equally. The resource allocation mode involved in the specification can represent a transmission mode, and the related transmission mode can represent a resource allocation mode.

The uplink and downlink configuration information and TDD configuration information involved in the present invention have the same meaning. The uplink and downlink configuration information and TDD configuration information in the text can be replaced equally. Similarly, sidelink uplink and downlink configuration information and sidelink TDD configuration information can be replaced equally, and they have the same meaning.

The TDD configuration information and sidelink TDD configuration information involved in the embodiment of the present invention include at least one TDD configuration pattern. The TDD configuration pattern contains corresponding configuration information, such as configuration period, reference subcarrier interval, etc.

In the specification of the present invention, uplink resources may refer to sidelink resources, and sidelink resources may refer to uplink resources. Similarly, uplink time slot resources correspond to sidelink time slot resources, and uplink symbol resources correspond to sidelink symbol resources.

Both the type 1 configuration scheduling permission in the specification of the present invention and the type 1 configuration scheduling permission in side-line communication indicate that the configuration scheduling permission does not require downlink control information DCI to activate or de-activate (de-activate, or release, release). After the configuration scheduling permission of type 1 is configured, the MAC entity (MAC entity) of the UE will store the configuration scheduling permission for side-line communication transmission.

In the specification of the present invention, mod represents the remainder calculation, for example, a mod b represents the remainder obtained by dividing a by b.

Sidelink communication scenario

1) Out-of-Coverage side-line communication: Two UEs performing sidelink communication have no network coverage (for example, the UE cannot detect anything that meets the "cell selection criteria" on the frequency where sidelink communication is required. Cell, which means that the UE has no network coverage).

2) In-Coverage sideline communication: Both UEs performing sidelink communication have network coverage (for example, the UE detects at least one cell that meets the "cell selection criteria" on the frequency that needs sidelink communication, Indicates that the UE has network coverage).

3) Partial-Coverage (Partial-Coverage) side-line communication: One of the UEs performing sidelink communication has no network coverage, and the other UE has network coverage.

From the UE side, the UE has only two scenarios without network coverage and with network coverage. Part of the network coverage is described from the perspective of sidelink communication.

The basic process of LTE V2X (sidelink) communication

Figure 1 is a schematic diagram showing LTE V2X UE side-line communication. First, UE1 sends sideline communication control information (SCI format 1) to UE2, which is carried by the physical layer channel PSCCH. SCI format 1 includes PSSCH scheduling information, such as PSSCH frequency domain resources. Secondly, UE1 sends sideline communication data to UE2, which is carried by the physical layer channel PSSCH. The PSCCH and the corresponding PSSCH adopt a frequency division multiplexing manner, that is, the PSCCH and the corresponding PSSCH are located on the same subframe in the time domain and are located on different RBs in the frequency domain. The specific design methods of PSCCH and PSSCH are as follows:

1) The PSCCH occupies one subframe in the time domain and two consecutive RBs in the frequency domain. The initialization of the scrambling sequence adopts a predefined value 510. PSCCH can carry SCI format 1, where SCI format 1 contains at least frequency domain resource information of PSSCH. For example, for the frequency domain resource indicator field, SCI format 1 indicates the starting sub-channel number and the number of consecutive sub-channels of the PSSCH corresponding to the PSCCH.

2) The PSSCH occupies a subframe in the time domain, and the corresponding PSCCH adopts frequency division multiplexing (FDM). The PSSCH occupies one or more continuous sub-channels in the frequency domain. The sub-channel represents n _subCHsize consecutive RBs _{in the frequency domain. The n subCHsize} is configured by the RRC parameter, and the starting sub-channel and the number of consecutive sub-channels It is indicated by the frequency domain resource indicator field of SCI format 1.

LTE V2X resource allocation method Transmission Mode 3/4

Figure 2 shows two resource allocation methods for LTE V2X, which are called base station scheduling-based resource allocation (Transmission Mode 3) and UE-sensing-based resource allocation (Transmission Mode 4). In LTE V2X, when there is eNB network coverage, the base station can configure the UE's resource allocation mode through UE-level dedicated RRC signaling (dedicated RRC signaling) SL-V2X-ConfigDedicated, or called the UE's transmission mode ,Specifically:

1) Resource allocation mode based on base station scheduling (Transmission Mode 3): The resource allocation mode based on base station scheduling indicates that the frequency domain resources used for sidelink sideline communication come from the scheduling of the base station. Transmission mode 3 includes two scheduling methods, namely dynamic scheduling and semi-persistent scheduling (SPS). For dynamic scheduling, the UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, and the CRC of the PDCCH or EPDCCH carrying the DCI format 5A is scrambled by the SL-V-RNTI. For SPS semi-persistent scheduling, the base station configures one or more (up to 8) configured scheduling grants through IE: SPS-ConfigSL-r14, and each configured scheduling grant contains a scheduling grant number (index) and scheduling Licensed resource period. The UL grant (DCI format 5A) includes the frequency domain resources of the PSSCH, as well as the indication information (3 bits) of the scheduling permission number and the indication information of SPS activation (activate) or release (release or deactivation). The CRC of the PDCCH or EPDCCH carrying the DCI format 5A is scrambled by the SL-SPS-V-RNTI.

Specifically, when the RRC signaling SL-V2X-ConfigDedicated is set to scheduled-r14, it means that the UE is configured in a transmission mode based on base station scheduling. The base station configures SL-V-RNTI or SL-SPS-V-RNTI through RRC signaling, and through PDCCH or EPDCCH (DCI format 5A, CRC uses SL-V-RNTI scrambling or SL-SPS-V-RNTI scrambling) ) Send an uplink scheduling permission UL grant to the UE. The uplink scheduling grant UL grant includes at least the scheduling information of the PSSCH frequency domain resources in the sidelink communication. When the UE successfully monitors the PDCCH or EPDCCH scrambled by SL-V-RNTI or SL-SPS-V-RNTI, the PSSCH frequency domain resource indicator field in the uplink scheduling grant UL grant (DCI format 5A) is used as the PSCCH (SCI format 1) indicates the frequency domain resources of the PSSCH, and sends PSCCH (SCI format 1) and the corresponding PSSCH.

For the semi-persistent scheduled SPS in transmission mode 3, the UE receives the DCI format 5A scrambled by SL-SPS-V-RNTI on the downlink subframe n. If the DCI format 5A contains the indication information of SPS activation, the UE determines the frequency domain resources of the PSSCH according to the indication information in the DCI format 5A, and determines the time domain resources of the PSSCH (PSSCH transmission subframe) according to information such as subframe n.

2) Resource allocation method based on UE sensing (Transmission Mode 4): The resource allocation method based on UE sensing indicates that the resources used for sidelink communication are based on the UE's sensing process of the candidate available resource set. When the RRC signaling SL-V2X-ConfigDedicated is set to ue-Selected-r14, it means that the UE is configured in the transmission mode based on UE sensing. In the UE sensing-based transmission mode, the base station configures the available transmission resource pool, and the UE determines the PSSCH sidelink transmission resource in the transmission resource pool (resource pool) according to certain rules (see the LTE V2X UE sensing process section for detailed process description) , And send PSCCH (SCI format 1) and the corresponding PSSCH.

NR carrier and sidelink carrier

The carriers involved in the specification of the present invention all represent a continuous segment of frequency domain resources in the frequency domain. The NR carrier represents the frequency at which the serving cell of the UE works. On the NR carrier, the UE receives downlink transmissions from the base station and uplink transmissions of the UE itself. The sidelink carrier indicates the frequency at which the UE performs side-line communication transmission and reception. The sidelink carrier involved in the specification of the present invention may mean an NR sidelink carrier, or an LTE sidelink carrier. On the NR sidelink carrier, the UE performs NR side-line communication transmission and reception; on the LTE sidelink carrier, the UE performs LTE side-line communication transmission and reception. Two identical carriers indicate that the frequency domain resources occupied by the two carriers are completely the same; if the frequency domain resources of the two carriers do not completely overlap, then the two carriers are called different carriers.

NR (including NR sidelink) parameter set (numerology) and NR (including NR) sidelink) slot

The parameter set numerology includes the meaning of sub-carrier spacing and cyclic prefix CP length. Among them, NR supports 5 sub-carrier intervals, respectively 15k, 30k, 60k, 120k, 240kHz (corresponding to μ = 0, 1, 2, 3, 4), Table 4.2-1 shows the set of supported transmission parameters, as follows Shown.

Table 4.2-1 Subcarrier spacing supported by NR

μμ	Δf＝2 ^μ·15[kHz] Δf=2 ^μ ·15[kHz]	CP(循环前缀)CP (cyclic prefix)
00	1515	正常normal
11	3030	正常normal
22	6060	正常，扩展Normal, extended
33	120120	正常normal
44	240240	正常normal

Only when μ=2, that is, the extended (Extended) CP is supported in the case of 60 kHz sub-carrier spacing, and only the normal CP is supported in the case of other sub-carrier spacing. For normal CP, each slot contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For μ=0, that is, 15kHz subcarrier interval, 1 time slot=1ms; μ=1, that is 30kHz subcarrier interval, 1 time slot=0.5ms; μ=2, that is 60kHz subcarrier interval, 1 time slot =0.25ms, and so on.

NR and LTE have the same definition of subframe, which means 1ms. For the subcarrier spacing configuration μ, the slot number in 1 subframe (1ms) can be expressed as

Range from 0 to

The slot number in a system frame (frame, 10ms) can be expressed as

Range from 0 to

among them,

with

The definition in the case of different subcarrier spacing μ is shown in the following table.

Table 4.3.2-1: The number of symbols contained in each slot in normal CP, the number of slots contained in each system frame, and the number of slots contained in each subframe

Table 4.3.2-2: The number of symbols contained in each slot when the CP is extended (60kHz), the number of slots contained in each system frame, and the number of slots contained in each subframe

On the NR carrier, the number SFN of the system frame (or frame for short) ranges from 0 to 1023. The concept of direct system frame number DFN is introduced in sideline communication. The number range is also 0 to 1023. The above description of the relationship between system frame and numerology can also be applied to direct system frame (Direct Frame), for example, a direct frame number. The duration of the system frame is also equal to 10 ms. For a sub-carrier interval of 15 kHz, a direct system frame includes 10 time slots, and so on. DFN is used for timing timing on the sidelink carrier.

Indication and determination method of NR TDD configuration information

The NR base station gNB configures cell-level TDD configuration information through TDD-UL-DL-ConfigCommon in SIB1, which includes:

● Reference sub-carrier interval μ _ref ;

●High-level parameter pattern1 (this information element is mandatory and represents TDD configuration style 1, the same below), which includes the following high-level parameters:

■Configuration cycle P(ms);

■The number of downlink time slots d _slots , the downlink time slots only contain downlink OFDM symbols (may be called DL-only time slots);

■ The number of downlink OFDM symbols d _sym ;

■ The number of uplink time slots u _slots , the uplink time slots only contain uplink OFDM symbols (which can be called UL-only time slots);

■ The number of uplink OFDM symbols u _sym .

The period of the above configuration information is P ms, corresponding to continuous

Time slots. Among the S time slots, there are first d _slots downlink time slots, and u _slots uplink time slots are located at the end of the S time slots. d _sym downlink OFDM symbols are located after d _slots downlink time slots, u _sym uplink OFDM symbols are located _{before u slots} uplink time slots, and the rest

Each OFDM symbol is an X symbol (X represents a flexible symbol). The X symbol may be a downlink symbol, an uplink symbol, or a guard interval symbol between downlink and uplink in different application scenarios. Among them, for normal CP (Normal CP),

For extended CP (Extended CP),

The TDD-UL-DL-ConfigCommon in SIB1 may include a high-level parameter pattern2 (this information element is Optional and represents TDD configuration pattern 2, the same below). The configuration information forms of pattern2 and pattern1 are the same (parameters of pattern2 include: period P2, d _{slots, 2} , u _{slots, 2} , d _{sym, 2} , u _{sym, 2} ), and the meaning of the corresponding parameters is the same as the corresponding parameter of pattern1. The reference subcarrier interval μ _{ref is the} same as pattern1, so the reference subcarrier interval μ _ref will not be repeatedly configured for pattern2. The period of the above configuration information is P2ms, corresponding to continuous

Time slots. Among S2 time slots, first are d _{slots, 2} downlink time slots, u _{slots, and 2} uplink time slots are located at the end of S2 time slots. d _{sym, 2} downlink OFDM symbols are located after the downlink slot, u _{sym, 2} uplink OFDM symbols are located before the uplink slot, and the rest

For extended CP (Extended CP),

When TDD-UL-DL-ConfigCommon contains both pattern1 and pattern2, the configuration period of the TDD configuration information is (P+P2) ms, including the above-mentioned S and S2 time slots (S in the time domain first, followed by S2 ).

The periods P and P2 in the above configuration information need to meet the following conditions:

1) P is a divisor of 20, that is, P is divisible by 20, and the first time domain symbol of every 20/P cycles is the first symbol of an even frame;

2) P+P2 is a divisor of 20, that is, P+P2 can be divisible by 20, and it needs to satisfy that the first time domain symbol of every 20/(P+P2) period is the first symbol of an even-numbered frame.

The possible value ranges of P and P2 include {0.5, 0.625, 1, 1.25, 2, 2.5, 5, 10} ms. The values of P and P2 also include 3ms and 4ms, which are represented by IE: dl-UL-TransmissionPeriodicity-v1530. When the base station configures dl-UL-TransmissionPeriodicity-v1530 in pattern1/2, the UE ignores the dl-UL-TransmissionPeriodicity corresponding to pattern1/2.

Sidelink resource pool

In side-line communication, the resources sent and received by the UE belong to the resource pool. For example, for the transmission mode based on base station scheduling in sideline communication (transmission mode 1 in NR sideline communication), the base station schedules transmission resources for the sidelink UE in the resource pool, or for the transmission mode based on UE perception in sideline communication ( In transmission mode 2) in NR side-line communication, the UE determines the transmission resource in the resource pool.

In the specification of the present invention, the configuration period (or the configuration length, or the length of the configured bitmap) of the side-line communication resource pool is represented _{by b ResourcePool.} Optionally, the configuration period is in units of time slots. The number of time slots configured in b _ResourcePool that can be used for sidelink transmission is represented _{by a slot.} For example, _{the length of b ResourcePool} is 40, and each bit is set to 1 to indicate that it can be used for sidelink transmission (that is, it belongs to a resource pool). There are a total of 20 bits set to 1 _{in b ResourcePool} _{, then a slot} = 20.

After the UE determines the time domain resources of the resource pool (for example, the time domain resources in the resource pool in units of time slots), the time slots in all resource pools are slotted (the slots in all resource pools from SFN 0 to 1023). , Or the slots in all resource pools in DFN 0 to 1023) are numbered according to the continuous and ascending rule starting from 0, which can be expressed as s _q (q=0, 1,..., q _max ), q is in In the specification of the present invention, it is called the logical number (logical number, or logical index) of the resource pool.

Available resources for sidelink transmission

The resources available for side-line communication transmission involved in the specification of the present invention are a superset of the above-mentioned side-line communication resource pool, which represents the union of the resource pools of each UE. For example, the base station gNB broadcasts a set of resources available for sideline communication and transmission in a cell, and configures the sideline communication resource pool for user equipment 1 and user equipment 2 in the resources available for sideline communication and transmission. The side-line communication resource pools of user equipment 1 and user equipment 2 may overlap in time-frequency resources, or may not overlap.

The above-mentioned resources available for side-line communication transmission may be referred to as side-line communication time slot resources (sidelink slots) for short. Optionally, the base station may indicate the sidelink slots through a bitmap, or the base station may use the same format as the NR TDD configuration pattern to include the number of uplink time slots (or the number of uplink time slots and the number of uplink time slots containing X symbols). The sum of the number of time slots), or the base station indicates the resources available for side-line communication transmission through the number of time slots available for side-line communication included in the same form of the NR TDD configuration pattern. For example, the base station indicates a configuration period P, which corresponds to the configuration period in the TDD configuration pattern configuration, and indicates the number of uplink (or available for side-line communication) time slots in this period (optionally, it can be used in this period) The inside only indicates the number of time slots available for uplink or sideline communication, which is still described in the same form as the NR TDD configuration style in the specification of the present invention, and the UE can determine the resources available for the above-mentioned sideline communication transmission.

In the specification of the present invention, the configuration period (or the configuration length, or the length of the configured bitmap) of the resources available for side-line communication transmission is represented _{by d AllSlots.} The number of time slots that can be used for sidelink transmission configured in d _AllSlots is represented _{by c SLSlots.} For example, if it is indicated in the same format as the NR TDD configuration style described above, then,

c _SLSlots = u _slots . Similarly, if two configuration styles of the above-mentioned NR TDD configuration style 1 and NR TDD configuration style 2 are adopted, then,

c _SLSlots = u _slots + u _{slots, 2} . The present invention includes, but is not limited to, the above-mentioned specific implementation of the indication of resources available for side-line communication transmission.

NR Type 1 Configuration Scheduling License (CG)

In Rel-15NR, on the basis of supporting DCI dynamic scheduling PUSCH, it also supports CG-based PUSCH transmission. In the specification of the present invention, CG stands for configured grant, that is, stands for configured scheduling permission. For NR type 1 configuration scheduling permission, the base station configures the CG for the UE through RRC signaling. In the NR type 1 configuration scheduling permission mechanism, the UE does not need to monitor the DCI dynamic scheduling that includes the UL grant, and can use the CG configured by the base station to send the PUSCH. Specifically, the base station configures the parameters of PUSCH transmission through the RRC signaling configuredGrantConfig, and the RRC signaling configuredGrantConfig includes rrc-ConfiguredUplinkGrant. The configured scheduling permission configuredGrantConfig includes at least the time domain resources, frequency domain resources, and resource periods of the semi-persistently scheduled PUSCH. Among them, rrc-ConfiguredUplinkGrant includes the scheduling of the above-mentioned time domain resources and frequency domain resources. In type 1 CG PUSCH transmission, the UE does not need to monitor the uplink scheduling grant (UL grant) in the DCI. After the base station is configured with type 1 CG (IE: configured GrantConfig), the UE can use the configured CG resources to transmit the PUSCH.

For the type 1 configuration scheduling permission in NR sideline communication, similarly, the base station configures the type 1 configuration scheduling permission information for the UE through RRC signaling, where the configuration information for configuring the scheduling permission also includes the resource period. After the base station is configured with type 1 CG, the UE can use the configured CG resources for side-line communication transmission.

Hereinafter, specific examples and embodiments related to the present invention will be described in detail. In addition, as described above, the examples and embodiments described in the present disclosure are illustrative descriptions for easy understanding of the present invention, and do not limit the present invention.

[Example 1]

FIG. 3 is a schematic diagram showing the basic process of the method executed by the user equipment in the first embodiment of the present invention.

In the following, the method executed by the user equipment according to the first embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 3.

As shown in FIG. 3, in the first embodiment of the present invention, the steps performed by the user equipment include:

In step S101, the user equipment receives the first side-line communication configuration information sent by the base station gNB.

Optionally, the first side-line communication configuration information includes configuration information of a side-line communication resource pool. Optionally, the configuration information of the side-line communication resource pool includes the first configuration period (or the first configuration length, or the length of the bitmap of the first configuration) b _ResourcePool . Optionally, the UE determines the number of resources (or the number of time slots) belonging to the resource pool in _{the first configuration period b ResourcePool} _{a slot} according to the configuration information of the side-line communication resource pool.

In step S102, the user equipment receives the second side-line communication configuration information sent by the base station gNB.

Optionally, the second sideline communication configuration information includes a second configuration period (or a second configuration length, or a length of a bitmap of the second configuration) _{dAllSlots of the resources available for sideline communication transmission} . Alternatively, the UE determines the period d of the second side configured to communicate transmission within _AllSlots number of resources available resources (or slot _number) c SLSlots. Optionally, the c _SLSlots represents the number of uplink time slots in the second configuration period d _AllSlots , or the number of side-line communication time slot resources.

In step S103, the user equipment receives the configuration information of the sideline communication configuration scheduling permission sent by the base station gNB.

Optionally, the configuration information of the side-line communication configuration scheduling permission includes a Period for configuring the scheduling permission.

Optionally, the configuration information of the side-line communication configuration scheduling permission includes the time domain resource offset timeDomainOffset of the configuration scheduling permission.

In step S104, the user equipment determines the configuration schedule according to the timeDomainOffset, and/or the configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and/or the Periodicity The permitted configuration information indicates the configuration scheduling permitted resource.

Optionally, the resource of the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission is a time slot resource of the configuration scheduling permission.

Optionally, the condition satisfied by the time slot resource configured for scheduling permission is:

or,

Wherein, optionally, q represents the logical number of the slot resource in the resource pool of the time slot for which the scheduling permission is configured, and N represents any integer greater than or equal to 0. Where, optionally,

or,

Among them, numberOfSlotsPerDirectFrame (or use

To represent, where 15k×2 ^μ Hz represents the sub-carrier interval corresponding to the side-line communication carrier) represents the number of time slots in a system frame (or, a direct system frame Direct Frame).

[Example 2]

Fig. 3 is a schematic diagram showing the basic process of the method executed by the user equipment in the second embodiment of the present invention.

In the following, the method executed by the user equipment according to the second embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 3.

As shown in Figure 3, in the second embodiment of the present invention, the steps performed by the user equipment include:

or,

or,

or,

or,

or,

Wherein, optionally, DFN and slot number in the direct frame respectively indicate the system frame number and the slot number in the system frame (or the direct system frame number and the direct frame number in the direct frame) where the slot resource of the time slot permitted by the configuration scheduling is located. The slot number in the system frame), N represents any integer greater than or equal to 0. Among them, numberOfSlotsPerDirectFrame (or use

[Example Three]

FIG. 4 is a schematic diagram showing the basic process of the method executed by the user equipment in the third embodiment of the present invention.

In the following, the method executed by the user equipment in the third embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 4.

As shown in Figure 4, in the third embodiment of the present invention, the steps performed by the user equipment include:

In step S201, the user equipment receives the first side-line communication configuration information sent by the base station gNB.

In step S202, the user equipment receives the second side-line communication configuration information sent by the base station gNB.

In step S203, the user equipment receives the configuration information of the sideline communication configuration scheduling permission sent by the base station gNB.

In step S204, the user equipment determines a resource for side-line communication transmission according to the configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and/or the Periodicity.

Optionally, the resources for side-line communication transmission are used to transmit PSCCH/PSSCH, or PSSCH.

Optionally, the resource for sideline communication transmission is a transmission resource corresponding to the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission.

Optionally, the transmission mode of the user equipment is a transmission mode based on base station scheduling (transmission mode 1).

Optionally, if the time domain resource (or time slot resource) for the PSCCH/PSSCH (or PSSCH) transmission determined by the user equipment corresponds to a logical number m in the resource pool, then the logical number in the resource pool The number is (m+j×Periodicity), or,

or,

The time slot resource of is also the transmission resource corresponding to the configuration scheduling permission (optionally, the frequency domain resources corresponding to the time slot resources with different logical numbers above, or the sub-channel sub-channels are the same or different) . Among them, j represents an integer greater than or equal to 1.

[Example Four]

Fig. 4 is a schematic diagram showing the basic process of the method executed by the user equipment in the fourth embodiment of the present invention.

In the following, the method executed by the user equipment according to the fourth embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 4.

As shown in Figure 4, in the fourth embodiment of the present invention, the steps performed by the user equipment include:

Optionally, the second side-line communication configuration information includes a second configuration period (or a second configuration length, or a bitmap length of the second configuration) of resources available for side-line communication transmission d _{AllSlots, 1} and Or the third configuration period (or the third configuration length, or the length of the bitmap of the third configuration) of the resources available for side-line communication transmission d _AllSlots,2 . Optionally, the UE determines the side of the second configuration period d _{AllSlots, 1} and the third configuration period d _{AllSlots, 2} (where d _AllSlots = d _{AllSlots, 1} + d _{AllSlots, 2} ) The resource number (or the number of time slots) c _SLSlots of the resources available for line communication transmission. Optionally, the c _SLSlots represents the number of uplink time slots in the second configuration period d _{AllSlots, 1} , or the number of side-line communication time slot resources c _{SLSlots, 1} and the third configuration period d _{AllSlots ,} The number of uplink time slots in 2, or the number of side-line communication time slot resources c _SLSlots, the sum of 2, that is, c _SLSlots = c _{SLSlots, 1} + c _{SLSlots, 2} .

or,

Fig. 5 is a block diagram showing a user equipment UE related to the present invention. As shown in FIG. 5, the user equipment UE80 includes a processor 801 and a memory 802. The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like. The memory 802 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories. The memory 802 stores program instructions. When the instruction is executed by the processor 801, it can execute the above method executed by the user equipment described in detail in the present invention.

The method and related equipment of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the various embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps and sequence shown above. The network nodes and user equipment shown above may include more modules, for example, may also include modules that can be developed or that can be developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are only exemplary rather than restrictive, and the present invention is not limited to specific information elements as examples of these identifiers. Those skilled in the art can make many changes and modifications based on the teaching of the illustrated embodiment.

It should be understood that the foregoing embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), etc.

In this application, "base station" may refer to a mobile communication data and control switching center with larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission. "User equipment" may refer to a user's mobile terminal, for example, including mobile phones, notebooks, and other terminal devices that can communicate with base stations or micro base stations wirelessly.

In addition, the embodiments of the present invention disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product that has a computer-readable medium with computer program logic encoded on the computer-readable medium, and when executed on a computing device, the computer program logic provides related operations to implement The above technical solution of the present invention. When executed on at least one processor of the computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. This arrangement of the present invention is typically provided as software, code and/or other data structures arranged or encoded on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy disk or hard disk, or as software, code and/or other data structures such as one or more Firmware or microcode on a ROM or RAM or PROM chip, or downloadable software images, shared databases, etc. in one or more modules. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

In addition, each functional module or each feature of the base station equipment and terminal equipment used in each of the foregoing embodiments may be implemented or executed by a circuit, and the circuit is usually one or more integrated circuits. Circuits designed to perform the functions described in this specification can include general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC) or general-purpose integrated circuits, field programmable gate arrays (FPGA), or other Programming logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when advanced technologies that can replace current integrated circuits appear due to advances in semiconductor technology, the present invention can also use integrated circuits obtained by using this advanced technology.

Although the present invention has been described above in conjunction with the preferred embodiments of the present invention, those skilled in the art will understand that various modifications, substitutions and changes can be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above-mentioned embodiments, but should be defined by the appended claims and their equivalents.

Claims

A method executed by user equipment, including:

Receiving the first side-line communication configuration information sent by the base station gNB;

Receiving the second side-line communication configuration information sent by the base station gNB;

The configuration information of the side-line communication configuration scheduling permission configured grant sent by the base station gNB is received.
The method of claim 1, wherein:

The first side-line communication configuration information includes configuration information of the side-line communication resource pool; and/or

The configuration information of the side-line communication resource pool includes the first configuration period of the resource pool.
The method according to claim 2, further comprising:

The user equipment determines the number of resources belonging to the resource pool in the first configuration period according to the configuration information of the side-line communication resource pool.
The method of claim 1, wherein:

The second side-line communication configuration information includes a second configuration period of resources available for side-line communication transmission.
The method according to claim 4, further comprising:

The user equipment determines the number of time slots of the resources available for the sideline communication transmission in the second configuration period.
The method of claim 1, wherein:

The configuration information of the side-line communication configuration scheduling permission includes the period Period for configuring the scheduling permission; and/or

The configuration information of the sideline communication configuration scheduling permission includes the timeDomainOffset of the time domain resource offset of the configuration scheduling permission.
The method according to claim 1, further comprising:

The user equipment determines, according to the timeDomainOffset, and/or the configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and/or the Period, the configuration scheduling permission The resources permitted by the configuration scheduling indicated by the configuration information.
The method according to claim 1, further comprising:

The user equipment determines the resources for side-line communication transmission according to the configuration information of the side-line communication resource pool, and/or the second side-line communication configuration information, and/or the Periodicity.
The method according to claim 8, wherein:

The resource of the sideline communication transmission is the transmission resource corresponding to the configuration scheduling permission indicated by the configuration information of the configuration scheduling permission; and/or

The resources of the side-line communication transmission are used to transmit the physical side-line communication control channel PSCCH and the physical side-line communication shared channel PSSCH, or PSSCH.
A user equipment including:

Processor; and

Memory, storing instructions;

Wherein, the instruction executes the method according to any one of claims 1 to 9 when run by the processor.